Finding the Third Proportional to 528 and 601.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528 : 601.50 = 601.50 : x
2. Step 2: Convert to fraction form
   528/601.50 = 601.50/x
3. Step 3: Cross multiply
   528x = 601.50 × 601.50
4. Step 4: Simplify right side
   528x = 361,802.25
5. Step 5: Solve for x
   x = 361,802.25/528
6. Step 6: Final answer
   x = 685.23